When I was involved with the BAe125, production aircraft on test used to be stalled "naturally" with stick pusher off. If the aircraft rolled one way or the other, the stall triggers were adjusted and the aircraft reflown. When the stall handing was satisfactory the instruction was issued to rivet the triggers in place. If I recall, the triggers didn't introduce any buffet but were there to actually stall the inboard wing first (rather than the tip).
The BAe146 also had breaker strips but as far as I recall, these were never adjusted. There was little or no pre-stall buffet or nose drop at the stall either (hence the stick shaker and stick pusher).